Extremely Rare Museum Quality Longianda termieri (Neltner & Poctey, 1950) – Issafen, Morocco | PAIS9611 - This specimen will be sent with a physical Authenticity Certificate (see picture); online version (copy-paste): https://www.artcertificate.eu/?qrcode=20260309124550 Trilobites from the Issafen Formation are exceptionally scarce in complete, well-prepared condition. This specimen was sandblasted under stereoscopic microscopy with minimal consolidation; no paint, varnish or artificial enhancement applied. OUR GRADING FOR THIS SPECIMEN: 5/5 ***** — rarity, size, premium-grade preparation, scientific interest, colour, all-natural condition. (Graded using our transparent 5-point system — see seller info for details.) This exceptionally large Longianda termieri (11.6 cm) originates from the Early Cambrian shale deposits of Issafen, Anti-Atlas Mountains, Morocco — a locality renowned for its diverse and poorly documented trilobite assemblage. The specimen exhibits the characteristic rust-red limonite rim typical of Issafen material, with a blue-green matrix that weathers to light grey. Professionally prepared under stereoscopic microscopy, the trilobite displays pronounced three-dimensional relief. Notably, the axial lobe preserves a row of vertical spines near the pygidium — a rare morphological feature among Early Cambrian trilobites. The surrounding matrix has been carefully reduced to enhance visual impact while maintaining structural integrity. Minimal consolidation applied; no paint or artificial enhancement. Geological context: Issafen yields one of Morocco's most significant Early Cambrian faunas, dominated by Ellipsocephalidae, Chengkouiidae, Gigantopygidae, Holmiidae, Neltneriidae, Saukiandidae, and late Fallotaspoidea. The greenish-blue shale matrix (freshly split) provides critical stratigraphic context for Redlichiidan evolution in Gondwana. Condition: Natural patina; professionally prepared; minimal consolidation only. Dimensions Trilobite: 11.6 × 10.7 cm (4.57 x 4.21 inches) Matrix: 16 x 13 cm (6.3 x 5.1 inches) Weight: ca. 750 g (ca. 1.65 lbs) Scientific Details Species: Longianda termieri (Neltner & Poctey, 1950) Family: Saukiandidae Order: Redlichiida Class: Trilobita Lithostratigraphy: Issafen Formation Age: Lower Cambrian, Atabanian Stage Locality: Issafen, Anti-Atlas Mountains, Morocco Collection Code: PAIS9611 | Collected: November 2025 Special notes on Coloration: The specimen exhibits a distinctive blue-green hue, likely resulting from mineralogical processes during diagenesis — possibly involving copper-bearing phases or altered silicates within the exoskeleton. This coloration contrasts sharply with the rust-red limonite rim that outlines the trilobite's margins, a characteristic feature of Issafen material. The bluish-toned matrix further enhances the three-dimensional relief of the axial lobe, cephalon, and pleurae, while the preserved vertical spines near the pygidium stand out with exceptional clarity. Together, these elements contribute both aesthetic appeal and significant taphonomic value. Please see the high-resolution photos for full details: specimen in matrix context, isolated view, and magnified close-ups. Additional images available upon request. Questions? We're happy to help. Shop, Papers and Contact (copy-paste): https://go.mediterranic.com/ Check our feedback at (copy-paste) https://link.mediterranic.com/reviews Shipping Worldwide registered shipping with a tracking number.